CN101790235B - Method and apparatus for reducing burst allocation information in broadband wireless communication system - Google Patents
Method and apparatus for reducing burst allocation information in broadband wireless communication system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
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- F21L4/027—Pocket lamps the light sources being a LED
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
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Abstract
The invention discloses a method and apparatus for reducing the burst allocation information in a broadband wireless communication system. A method for reducing the burst allocation information by a base station in a broadband wireless communication system, includes the steps of determining the type of a reduced connection identifier (CID) for the burst allocation information based on the range of the CID of a mobile terminal connected to the base station, and transmitting the configure information comprising the type segment representing the reduced CID to the mobile terminal.
Description
The application is that application number is 200580007979.4, the applying date is on March 11st, 2005, denomination of invention is divided an application for the application of " using the basic connection identifier (CID that reduces to construct the method and apparatus of map information element in the broadband orthogonal frequency division multiplexing connecting system ".
Technical field
The present invention relates to a kind of system of broadband wireless communication, more particularly, the present invention relates to a kind of method that is used for bursty data is assigned to mobile subscriber station (MSS).
Background technology
Developed traditional mobile communications network voice-based business is provided, that is, and voice communication.There is inherent following shortcoming in mobile communications network: thus do not need a lot of bandwidth data transmission bandwidth narrow relatively owing to only send speech data, and service fee is expensive.But in recent years, along with comprising that the internet inserts and the wireless traffic growth of requirement of content of multimedia, traditional mobile communications network just can not be met consumers' demand.
The Institute of Electrical and Electric Engineers of IEEE (IEEE) 802.16e standard group (International Standards Organization) is being gone canvassing and is being adopted IEEE 802.16d to be used as being used for the wireless broadband internet business is offered the standard at fixed-line subscriber station.
Compare with traditional wireless technology, IEEE 802.16d standard is through providing wide bandwidth and allow a large amount of storage data to be sent out at short notice and through being allowed channel to be used efficiently by all user's shared channels for data.But in IEEE 802.16d standard, all users that are connected to the base station share and the use common signal channel.And, owing to the use interval of using channel through each user of base station assigns, so each user must be given with (MAP) notice of expression burst allocation information in the base station, so that each user can both share and use channel at each frame.In IEEE 802.16d standard, this MAP is classified into UL_MAP and DL_MAP, and it is comprised in the previous section of each frame, and is sent to all users then.
Fig. 1 is the figure that shows according to the frame structure of down link among the IEEE 802.16d of prior art and up link.With reference to Fig. 1, vertical axis representes that a plurality of number of sub-channels 147 and trunnion axis represent that OFDM inserts (OFDMA) number of symbols 145.
At first, down link 149 will be described.Preamble 111 is positioned at the front portion of the subchannel of forming down link.Be positioned at after the preamble 111 such as the broadcast data information of frame control head (FCH) 113, DL_MAP 115 and UL_MAP 117.In addition, DL bursts 121,123,125,127 and 129 is positioned at after the broadcast data information.
Then, in up link 153, preamble 131,133 and 135 utilizes distance adjustment subchannel (ranging subchannel) 143 to be present in the front portion of UL bursts 137,139 and 141 respectively.
The MAP at each terminal of MAP information element (MAP_IE) expression.Whether the basic connection identifier (CID that the inspection of each terminal comprises in MAP_IE (basic CID) is the basic CID at terminal and sends/receive bursts through frequency and the subchannel of representing at the MAP_IE by correspondence on the code element.
As stated, in existing IEEE 802.16 wideband OFDM A systems, the base station allocates the subchannel to portable terminal, and it will be used for through bursts being sent to each terminal of corresponding frame such as the broadcast data information of DL_MAP and UL_MAP.
But the base station must send to each terminal with burst allocation information.Assignment information itself according to sending is forced at big expense in the system.Specifically, when a plurality of terminals were connected to the base station, burst allocation information had reduced systematic function, and this is because burst allocation information has been used the more resource of shared transmission channel.
Summary of the invention
Therefore, the present invention has been used to solve the above-mentioned problem that takes place in the prior art, and an object of the present invention is to provide and a kind ofly be used to construct burst allocation information so that reduce the method for expense.
Another object of the present invention provides a kind of method that is used for reducing through the connection identifier (CID (CID) that reduces to be used to send burst allocation information at system of broadband wireless communication overhead.
Another object of the present invention provides a kind of method that reduces that is used for being inserted into through the system information that will represent whether to reduce CID at system of broadband wireless communication the connection identifier (CID (CID) at the terminal that is operatively connected to the base station in the frame.
Another object of the present invention provides a kind of method that reduces that is used at the connection identifier (CID (CID) of system of broadband wireless communication control terminal, and it can change the use that is used to confirm the CID that reduces and the threshold value at the terminal of one of not using, be connected to the base station.
According to an aspect of the present invention; A kind of method that in system of broadband wireless communication, reduces the size of burst allocation information through the base station is provided; Said method comprises: based on the scope of the basic connection identifier (CID (CID) of the mobile subscriber station that is connected to the base station, confirm to be used for the type of the CID that reduces of burst allocation information; And the configuration information of type field that will comprise the type of the CID that reduces of expression sends to mobile subscriber station.
According to an aspect of the present invention; Base station in a kind of system of broadband wireless communication is provided; Said base station comprises: controller, be used for scope based on the basic connection identifier (CID (CID) of the mobile subscriber station that is connected to the base station, and confirm to be used for the type of the CID that reduces of burst allocation information; And transmitter, be used for the configuration information of the type field of the type that comprises the CID that reduces of expression is sent to mobile subscriber station.
According to an aspect of the present invention; A kind of method that in system of broadband wireless communication, reduces the size of burst allocation information through mobile subscriber station is provided, and said method comprises: the configuration information of type field that receives the type of the connection identifier (CID (CID) that comprises that expression reduces from the base station; And optionally use the CID that reduces based on said type field, wherein, the type of the CID that reduces is confirmed based on the scope of the basic CID of mobile subscriber station by the base station.
According to an aspect of the present invention; Mobile subscriber station in a kind of system of broadband wireless communication is provided; Said mobile subscriber station comprises: receiver is used for receiving from the base station configuration information of type field of the type of the connection identifier (CID (CID) comprise that expression reduces; And controller, be used for optionally using the CID that reduces based on said type field, wherein, the type of the CID that reduces is confirmed based on the scope of the basic CID of mobile subscriber station by the base station.
According to an aspect of the present invention; A kind of method that in system of broadband wireless communication, reduces the size of burst allocation information through the base station is provided; Wherein transmit frame comprises code element in this system of broadband wireless communication; Orthogonal sub-carriers on the frequency axis is formed each code element based on scheduled time unit, and said method comprises: when the type of the CID that when in advance the basic CID that has the portable terminal that is connected to the base station in the scope being set, confirms to reduce, so that reduce the size of burst allocation information; And will comprise the use of the CID that reduces of expression and the configuration information of the enable field one of do not used sends to portable terminal.
According to another aspect of the present invention; A kind of method of in system of broadband wireless communication, passing through base station structure burst allocation information is provided; Wherein transmit frame comprises code element in system of broadband wireless communication; Orthogonal sub-carriers on the frequency axis is formed each code element based on scheduled time unit, and said method comprises: when the use of the connection identifier (CID (CID) that when in advance the basic CID that has the portable terminal that is connected to the base station in the scope being set, will be used for representing reducing with one of do not use the enable field with type to be set to configuration information; And the CID that will reduce is arranged in the burst allocation information so that reduce the size of burst allocation information.
According to another aspect of the present invention; Base station in a kind of system of broadband wireless communication is provided; Wherein transmit frame comprises code element in this system of broadband wireless communication; Orthogonal sub-carriers on the frequency axis is formed each code element based on scheduled time unit; Said base station comprises: controller is used for confirming in the base station being provided with in advance the basic connection identifier (CID (CID) that whether has the terminal in the scope, and will be used for that the use of the CID that reduces is set and one of use the enable field with type to be set to configuration information; Preamble is provided with the unit, is used to carry out the system synchronization between base station and terminal; Traffic unit is used to receive the traffic carrying capacity of sending from the upper end; And transmitter, be used for sending to the terminal with carrying out the multiplexed frame that obtains through the burst allocation information that will comprise configuration information, preamble and traffic carrying capacity.
According to another aspect of the present invention; Portable terminal in a kind of system of broadband wireless communication is provided; Wherein transmit frame comprises code element in this system of broadband wireless communication; Orthogonal sub-carriers on the frequency axis is formed each code element based on scheduled time unit, and said portable terminal comprises: receiver is used for received frame and carries out the system synchronization between base station and portable terminal; The burst allocation information detector is used for detecting burst allocation information and this burst allocation information being sent to controller from said frame; Controller is used for being used to represent the use of the connection identifier (CID (CID) that reduces and one of not using the enable field with type from the inspection of said burst allocation information, and is provided with whether use the CID that reduces based on said enable field; And traffic processor, be used to receive frame, and utilize from the burst allocation information of said controller transmission to come said frame is decoded from said receiver.
Description of drawings
From the detailed description below in conjunction with accompanying drawing, above and other objects of the present invention, feature and advantage will be more obvious, wherein:
Fig. 1 is the figure that shows according to the frame structure of up link in the wideband OFDM A system of prior art and down link;
Fig. 2 is the figure that shows the frame structure of up link and down link in the wideband OFDM A system according to an embodiment of the invention;
Fig. 3 A is the figure that shows according to the structure of the UL-MAP_IE in the wideband OFDM A system of prior art;
Fig. 3 B is the figure that shows according to the structure of the DL-MAP_IE in the wideband OFDM A system of prior art;
Fig. 4 is the figure of explanation according to the CID distribution method in the wideband OFDM A system of prior art;
Fig. 5 is the flow chart that be used for use CID in the base station method of generation MAP_IE that reduce of explanation according to first embodiment of the invention;
To be explanation change to basic CID in the base station flow chart of the CID compression method of the CID that reduces according to the CID that reduces of being used for using of first embodiment of the invention to Fig. 6;
Fig. 7 be explanation according to second embodiment of the invention be used for use a plurality of CID to come to produce selectively the flow chart of the method for MAP_IE in the base station;
Fig. 8 shows the block diagram of the structure of base station according to an embodiment of the invention;
Fig. 9 explains the flow chart that is used for sending through the base station method of burst allocation information according to an embodiment of the invention;
Figure 10 shows the block diagram of the structure of portable terminal according to an embodiment of the invention; And
Figure 11 is the flow chart that explanation is used for being received from the base station by portable terminal the method for burst allocation information.
Embodiment
Hereinafter, will illustrate and describe according to a preferred embodiment of the invention.Identical Reference numeral is used to specify and those element components identical that in other accompanying drawing, shown.In the description below of the present invention, when it can make theme of the present invention become not know, with omitting to the known function introduced here and the detailed description of configuration.
The present invention has advised a kind of method that is used to reduce to send the employed CID of burst allocation information.In addition, the present invention has advised that a kind of being used for is inserted into the method that reduces of CID that frame is operatively connected to the terminal of base station through the system information that will represent whether to reduce CID.
In the following description, note only describing and understand the needed part of operation of the present invention, and in the description about remainder that will omit within the theme of the present invention except said part.
Hereinafter, will the frame structure of up link and down link according to an embodiment of the invention be described with reference to Fig. 2.
With reference to Fig. 2, vertical axis representes that a plurality of subchannels and trunnion axis represent the OFDMA code element.
Preamble 210 is positioned at the front portion of the subchannel of forming down link 200.Then, system information channel (SICH) 220 is sent to all terminals in the sub-district, and comprise that the mini MAP 230 of DL MAP element 231 and UL MAP element 232 is positioned at after the preamble 210 in order.At last, the bursts 240 to 244 of code element is positioned at after the mini MAP 230.
The CID enable field that reduces preferably includes a bit and is enabled during less than predetermined threshold when the quantity of the portable terminal that is connected to the base station.Perhaps, can use two or more threshold values.A plurality of bits as enable field substitute the CID enable field that reduces to come indication map also be possible to the information of the sizes values of the CID that reduces through comprising.For example, when the CID type field comprised two bits and is set to " 00 ", the CID type field was mapped to the CID of 10 bits.When the CID type field was set to " 01 ", the CID type field was mapped to the CID of 12 bits.When the CID type field was set to " 10 ", the CID type field was mapped to the CID of 14 bits.When the CID type field was set to " 11 ", the CID type field was mapped to the CID of 16 bits.
Select as another, can be with enabling such as the CID that reduces or the information of CID type is inserted among the MAP_IE who in each frame, sends so that substitute SICH.In this method, the terminal receives a MAP_IE and understands the CID type that will use during corresponding to the MAP_IE at terminal when reference.
Root MAP 221 preferably includes 3 fields, that is, and and RmNsch0 field 222, RmNsch1 field 223 and RmNsch2 field 224.This field has the size of 6,5 and 5 bits respectively.The physics size of RmNsch0 field 222, RmNsch1 field 223 and RmNsch2 field 224 indication mini-MAP0 230, mini-MAP1 231 and mini-MAP2 232 has been accomplished modulation and demodulation to it.
Here, the demodulation code plan that is used for each mini-MAP of demodulation sign indicating number is confirmed as 1/12 QPSK, 1/2QPSK and 1/216 QAM respectively in advance.Mini-MAP0230 uses 1/12QPSK, and it is minimum demodulation code plan, and mini-MAP2 232 uses maximum demodulation code plan.The demodulation sign indicating number can be carried out to mini-MAP0 230 in the terminal that is connected to the base station.Approach the terminal of base station and can carry out the demodulation sign indicating number mini-MAP2 232.
Mini-MAP0 230 comprises a plurality of MAP_IE 233 and 234, and mini-MAP1 231 comprises a plurality of MAP_IE 235,236 and 237, and mini-MAP2 232 comprises a plurality of MAP_IE 238 and 239.Each MAP_IE representes the UL-MAP_IE 234,236,237 or 239 or the DL-MAP_IE 233,235 or 238 at each terminal at each terminal.In addition, each MAP_IE representes to be used for the MAP with corresponding UL bursts of each MAP_IE and DL bursts.
The present invention has advised a kind of method that is used for reducing forming the CID of the MAP_IE that comprises at mini-MAP.The structure of the MAP_IE of prior art at first, will be described with reference to Fig. 3 AA and 3BB.
Fig. 3 AA is the figure of structure that shows the UL-MAP_IE of prior art.
With reference to Fig. 3 AA, UL-MAP_IE has defined the 2 dimension bandwidth allocation information that are used for the UL bursts and has been placed in chronological order.Here, can CID be assigned to corresponding UL-MAP_IE is used as clean culture ID, multicast ID or broadcasts ID.According to one embodiment of present invention,, uses CID the CID that reduces when being clean culture ID.
It is the designator that is used to distinguish the physical parameter of the UL bursts that is used for being distributed that uplink interval is used sign indicating number (" UIUC ").When the value of UIUC is 15, rely on the IE of the UIUC of expansion to exist.On the contrary, when the value of UIUC is not 15, there is skew.This skew is for being a time slot with the initial relevant OFDMA symbol offset of corresponding bursts and the unit of this skew.In addition, said skew is the relative value that is used for the distribution zero-time of UL-MAP message.
Fig. 3 B is the figure that shows the structure of DL-MAP_IE.
With reference to Fig. 3 BB, DL-MAP_IE has defined the 2 dimension bandwidth allocation information that are used for the DL bursts." UIUC " is the designator of the physical parameter of the DL bursts that is used for being distributed.The original position of the bursts in the frame of " StartPS " indication correspondence.CID exists when using corresponding bursts, and this CID is assigned to corresponding DL-MAP_IE is used as clean culture ID, multicast ID or broadcasts ID.According to one embodiment of present invention, use the CID that reduces during for clean culture as CID.
Hereinafter, will the method that be used for being distributed in the CID that Fig. 3 AA and 3BB show be described with reference to Fig. 4.With reference to Fig. 4, basic CID is the CID that is assigned to each terminal; Can distribute the CID from 0x0001 to m.The terminal receives a basic CID from the base station when being connected to network, and the base station utilizes basic CID that bursty data is assigned to the terminal when distribution MAP_IE.
Here, when in SICH, using the enable field of a bit, the present invention is restricted to predetermined value (for example, 2^10) with this assignable value.In addition, when the quantity at the terminal that is connected to the base station during less than predetermined value, the base station utilizes the CID that reduces to replace basic CID to come the MAP_IE of distributing terminals.Therefore, according at the bit of basic CID from LSB (least significant bit) scope of the significance bit among to MSB (highest significant position) confirm aforesaid basic CID.For example, the CID that reduces can have the size (initial from the LSB of basic CID) of 10 bits.Best, the CID that reduces is not more than 16 bits.
But when use had the CID type field that reduces of a plurality of bits, the base station selected the CID that reduces big or small through being mapped to by the indicated value of CID type field that reduces.
The CID that preferably will reduce enables to be inserted among the MAP_IE who utilizes each alternative SICH transmission with the CID type.
Hereinafter, with reference to Fig. 5 to 7 method that is used to reduce CID is in accordance with a preferred embodiment of the present invention described.
Fig. 5 is the flow chart that first embodiment be restricted to 1 the CID that reduces is used in explanation, and Fig. 6 is the flow chart that explanation comprises second embodiment of a plurality of spendable CID that reduce.
Fig. 5 is explanation according to flow chart first embodiment of the invention, produced the method for MAP_IE according to the value that in the CID enable field that reduces, is provided with by the base station.
With reference to Fig. 5, the quantity at terminal of base station is confirmed to be connected to less than predetermined threshold value (2^10) in the base station whether in step 500.When the quantity at terminal during less than threshold value, the base station is set to 1 with the CID enable field that reduces in the SICH of transmit frame in step 510.
In step 520, the base station forms the MAP_IE with CID that 10 bits reduce and replaces basic CID when sending corresponding frame.
When the quantity at the terminal that is connected to the base station during greater than threshold value (2^10), the base station will the CID enable field that reduces in SICH in step 530 be set to 0 and in step 540, when producing the burst allocation information that is used for each terminal, produce the MAP_IE with existing basic CID.
To be explanation be 0, be used to use the flow chart of the CID compression method of the CID that reduces according to value first embodiment of the invention, that when the quantity at the terminal that is connected to the base station drops under the predetermined quantity and wherein use the base station of the CID that reduces that the CID enable field that reduces has been set Fig. 6.
This flow process (for example is reduced to constant level relevant for a kind of quantity when the terminal that is connected to the base station; 2^10-delta; Delta is a positive integer) use the method for the CID that reduces when following; And wherein when the quantity at the terminal that is connected to the base station during greater than specific quantity (2^10), the base station produces the MAP_IE with existing basic CID.Here, delta is used for preventing that at specific quantity (2^10) the CID compression from too frequent critical value (margin value) taking place when the quantity at terminal on every side when changing.When considering, confirm delta by the operator such as the predetermined variable of communication environment.
With reference to Fig. 6, whether the quantity at terminal of definite current connection in step 600, base station is less than predetermined quantity.When the quantity at the terminal of current connection during less than intended level, the terminal that has more than the basic CID of particular value (2^10) is extracted in the base station in step 610.Basic CID is redistributed in the base station in step 620, be less than the particular value (2^10) at the terminal of being extracted.Then, the base station is set to 1 with the CID enable field that reduces among the SICH in step 630.In this method, the base station uses the CID that reduces of the LSB of 10 bits among the basic CID (16 bit) to substitute basic CID in the process that from next frame, produces MAP_IE.
Fig. 7 is explanation is provided with the method for the MAP_IE in the base station according to a plurality of CID of the use of second embodiment of the invention a flow chart.
With reference to Fig. 7, the quantity at the terminal that is connected to the base station is measured in the base station in step 710.Then, the corresponding CID of quantity with the terminal is selected in the base station in step 720.The base station is selected the immediate threshold value of quantity with the terminal among a plurality of threshold values.For example, when threshold value is 2^10,2^12,2^14 or 2^16 and the quantity that is connected to the terminal of base station when being 2^13, base station selected 2^14 is as threshold value.
Thereafter, the base station is confirmed and the corresponding CID type of threshold value.For example, when threshold value is 2^10, confirm the CID type of 10 bits.When threshold value is 2^12, confirm the CID type of 12 bits.When threshold value is 2^14, confirm the CID type of 14 bits.When threshold value is 2^16, confirm the CID type of 16 bits.
In step 730, base station basis determined CID type as stated is mapped to ' 00 ', ' 01 ', ' 10 ' or ' 11 ' with the CID type field.Here, the base station can be inserted into the CID type among SICH or the mini MAP in step 740 according to the embodiment of aforesaid correspondence.
In step 740, the base station is used with the corresponding CID of determined CID type and is formed miniMAP.
Hereinafter, with describing the structure of base station according to an embodiment of the invention.
Fig. 8 is the block diagram that shows according to the structure of base station 800 of the present invention.With reference to Fig. 8, whether the basic CID at controller 801 definite terminals is present in advance is provided with in the scope.When it when being such, controller 801 is formed for indicating whether to use the enable field of the CID that reduces in MAP_IE.Enable field also can be used CID enable field that reduces and the CID type field with a plurality of bits and a plurality of fiducial values.
Controller 801 produces the CID that reduces according to enable field.For example, when enable field was the CID type field of 2 bits, the CID type field can have 4 values, that is, and and ' 00 ', ' 01 ', ' 10 ' and ' 11 '.Here, basic CID is used in ' 00 ' expression.In addition, when the CID type field was ' 01 ', ' 10 ' or ' 11 ', controller 801 utilized the type that is provided with in advance of the CID that reduces to carry out mapping.Then, controller 801 CID that will reduce is arranged among the MAP.
Executive system is synchronously and produce the preamble of the sub-district that is used for confirming the terminal in producing the process of frame for preamble generator 803.When the data recovery was carried out at the terminal, preamble also can be used for channel estimating; Preamble uses a plurality of patterns that are provided with in advance.
The traffic carrying capacity that traffic unit 805 will send to upper end (such as base station controller) is stored in the internal buffer.
807 pairs of MAP, preamble and traffic informations that produced by controller 801 of OFDM transmitter carry out multiplexed, and produce the frame that will send to the terminal.Owing to be used for equipment in the multiplexed and inverse FFT of OFDM transmitter 807 not within scope of the present invention, so will omit description to this equipment.
Hereinafter, will the method for being sent burst allocation information by the base station be described with reference to Fig. 9.
With reference to Fig. 9, in step 900, the controller 801 of base station 800 is measured the basic CID scope that is used for portable terminal.In step 910, whether the basic CID that controller 801 confirms to be connected to the portable terminal of base station 800 is comprised in advance and is provided with within the scope.When the basic CID of the portable terminal that is connected to base station 800 is comprised in when being provided with within the scope in advance; Controller 801 produces the enable field that is used for indicating the use of the CID that reduces and one of do not use in step 920, according to the type of the CID that reduces of enable field and the CID that reduces, and the enable field that is produced is stored among the MAP with the CID that reduces.In step 940, OFDM transmitter 807 pairs of MAP, preamble and traffic informations carry out multiplexed, and produce frame.In step 950, OFDM transmitter 807 sends to portable terminal with the frame that is produced.
When the basic CID of portable terminal is not comprised in (step 910) when being provided with within the scope in advance, controller 801 is arranged on basic CID among the MAP in step 910.After that, OFDM transmitter 807 carries out multiplexed in step 940 to MAP, preamble and traffic information, and produces frame.
The structure of portable terminal hereinafter, will be described with reference to Figure 10.
With reference to Figure 10, the receiver 1010 of portable terminal 1000 is 800 received frames from the base station.Receiver 1010 from the frame that is received, detect preamble and executive system synchronous.
MAP detector 1020 received frames and detection MAP wherein.Then, MAP detector 1020 sends to controller 1040 with the MAP that is detected.
Whether controller 1040 inspection enable field exist from the CID that reduces of MAP so that confirm.When after the inspection enable field, using the CID that reduces, the CID that controller 1040 reduces through application detects the reception traffic information.When not having to use the CID that reduces, controller 1040 detects the reception traffic information through using traditional basic CID.When enable field is when comprising the CID type field of a plurality of bits, the type of use that controller 1040 is provided with the CID that reduces and the CID that one of does not use and reduce.
Traffic processor 1030 comprises buffer, the traffic data that storage is sent from receiver 1010, and the MAP that uses slave controller 1040 to send comes traffic data is decoded.
Hereinafter, will with reference to Figure 11 describe a kind of in portable terminal 1000 base station 800 receive the method for burst allocation information.
With reference to Figure 11, at first, portable terminal 1000 passes through the frame that receiver 1010 receives 800 transmissions from the base station in step 1110.Receiver 1010 utilizes the preamble of received frame to carry out the system synchronization between base station 800 and portable terminal 1000.Receiver 1010 sends to MAP detector 1020 with frame in executive system synchronously.In step 1120, MAP detector 1020 detects MAP and detected MAP is sent to controller 1040 from this frame after receiving frame.In step 1130, whether the enable field of controller 1040 inspection MAP uses the CID that reduces with inspection.
When CID that use reduces, execution in step 1140.In step 1140, controller 1040 is used the CID that reduces based on the field that enables.When with the CID type field when the enable field, controller 1040 can be provided with the use of the CID that reduces and the type of the CID that one of does not use and reduce.In step 1160, controller 1040 utilizes the MAP that is included in the traffic data of storage in the traffic processor 1030 to extract burst information.
In step 1130, when not having to use the CID that reduces, execution in step 1150.In step 1150, basic CID is used and used to controller 1040.In step 1160, controller 1040 utilizes and comprises that the MAP of the traffic data that receives extracts burst information.
According to aforesaid the present invention, when utilization is sent the MAP_IE that is used for burst allocation through the CID that reduces that basic CID obtained that reduces corresponding terminal, can reduce overhead.
Though described the preferred embodiments of the present invention for illustrative purposes; But it will be appreciated by those skilled in the art that; Under not having to break away from the situation like disclosed scope of the present invention and spirit in the claim enclosed; Various modifications, interpolation and replacement are possible, and said claim comprises the four corner of its equivalent.
Claims (6)
1. the base station in the system of broadband wireless communication, said base station comprises:
Controller; Whether the basic connection identifier (CID CID that is used to confirm to be connected to the mobile subscriber station of base station is present in is provided with in the scope in advance; If being present in, this basic CID is provided with in advance in the scope; Then generate use or the obsolete enable field of the CID that indication reduces and according to the CID that reduces of this enable field, and this enable field and this CID that reduces are set in MAP information element IE;
The preamble generator is used to generate preamble;
Traffic unit is used for storage service amount data; With
Transmitter is used for multiplexing MAP IE, preamble and traffic data with delta frame, and this frame is sent to mobile subscriber station.
2. base station according to claim 1, wherein, said enable field comprises at least two bits, these at least two bits are represented in the available types of the CID that uses and reduce of basic CID.
3. base station according to claim 1, wherein, the said CID that reduces comprises at least one least significant bit LSB of basic CID according to said enable field.
4. the mobile subscriber station in the system of broadband wireless communication, said mobile subscriber station comprises:
Receiver is used for the received frame from the base station, and from the frame that is received, detects preamble;
The MAP detector is used for detecting MAP information element IE from the frame that is received;
Controller; Be used for checking whether enable field is present in MAP IE with the connection identifier (CID of confirming to reduce (CID); If after this enable field of inspection, used the CID that reduces; Then use the CID that reduces and detect traffic data,, then use basic CID and detect traffic data if do not use the CID that reduces; With
Traffic processor is used for storage service amount data and with traffic data decoding,
Be present in the scope that is provided with in advance if wherein be connected to the basic CID of the mobile subscriber station of base station, then this enable field is generated the use of the connection identifier (CID (CID) that reduces with expression or is not used.
5. mobile subscriber station according to claim 4, wherein, said enable field comprises at least two bits, these at least two bits are represented in the available types of the CID that uses and reduce of basic CID.
6. mobile subscriber station according to claim 4, wherein, the said CID that reduces comprises the available types of at least one least significant bit LSB with the CID that reduces of basic CID.
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| JP4477058B2 (en) | 2010-06-09 |
| EP2190142A3 (en) | 2010-08-04 |
| EP2190142B1 (en) | 2018-09-12 |
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| US8018969B2 (en) | 2011-09-13 |
| BRPI0508694A (en) | 2007-08-21 |
| KR100678180B1 (en) | 2007-02-02 |
| CN1930804B (en) | 2012-05-23 |
| CN101790235A (en) | 2010-07-28 |
| US20100142473A1 (en) | 2010-06-10 |
| RU2343636C2 (en) | 2009-01-10 |
| RU2006132495A (en) | 2008-03-20 |
| AU2005222291A1 (en) | 2005-09-22 |
| CA2557535A1 (en) | 2005-09-22 |
| EP1723735A1 (en) | 2006-11-22 |
| EP1723735B1 (en) | 2018-10-24 |
| CA2557535C (en) | 2012-05-15 |
| US20050201269A1 (en) | 2005-09-15 |
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